RNA FINAL EXAM QUESTIONS AND ANSWERS
The polarity of doubled-stranded DNA arises from A. negative charges on the backbone phosphates B. the presence of 5' phosphates on one end and 3' hydroxyls on the other C. base pairing D. the sequence of bases, which is strand-specific - Answer- B A missense mutation is one in which A.the altered codon codes for the same amino acid. B.the altered codon codes for a different amino acid. C.the mutant protein is shorter than normal. D.insertion or deletion results in a shift in the reading frame. - Answer- B Western, Southern, and Northern blots are used to analyze a.Proteins, RNA, and DNA respectively b.RNA, DNA, and Proteins respectively c.DNA, RNA, and Proteins respectively d.Proteins, DNA, and RNA respectively - Answer- D Which of the following is involved in transcription in prokaryotes, but not in eukaryotic transcription? A.regulatory proteins B.RNA polymerase C.promoters D.operators - Answer- Which is not a function of the 7-methylguanosine cap? A. protection from exonucleases B. promoting mRNA nuclear export C. stimulation of RNA polymerase elongation D. stimulation of translation - Answer- C Each chromosome is composed of a single molecule of DNA, and genes are sequences of __________. A.DNA B.RNA C.amino acids D.chromosomes - Answer- A
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